Fly-wheel compensating system.



L. THALLMAYER. FLY WHEEL GOMPENSATING SYSTEM. APPLICATION FILED MAY 13, 1912.

' [0221264064, Mwmm.

flttariwy.

UNITED STATES PATENT oFFio LUDWIG A MAYE Qo zttnrorr, swITzERLaNn, ASSIGNOR T0 AKTIEMGESELL- SCI-IAFT BROWN BOVERI ,& CIE., or BADEN, swrrznnnaun.

FLY-WHEEL comrnitsa'rrne SYSTEM.

To all 207mm zt mag concern.

Be itknown that I, LUnwrG TIL-\LLMAYER, a subject of the Emperor of Austria-Hum; gar-y, and residing at Ziirioh, Switzerland, have invented. certain new and useful Imro\"e1nents in Fly-\Vheel Compensating Systems, of which the following is a specification. I

Thisinvention relates to the regulation of dynamo electric machinery and more particularlyto the regulation of dynamos feeding motors for .the working of hauling I plants-andthe like.

This invention consists in exciting the regulating ,macl1ine in such a manner that its terminal voltagevaries in the same way as the starting machine which is connected inparallel with it.

Referring to the accompanying diagrammatic drawing, the figure shows an arrangement embodying one form of the present invention.

The motor 3 when driving a hauling plant for instance, is electrically connected to a starting generator 2, driven by a suit-able prime mover 6 and to a regulating motor generator 1 provided with a field winding 4 and connected to a fly Wheel 10. The field winding 5 of the starting machine 2 is con nected to the mains 8 through a variable resistance 9. An additional exciting winding 7 is provided for the machine 1 having in series therewith a resistance 11 automatically variable by the double wound solenoid 12, one winding of which receives current depending on the terminal voltage of the dynamo 2 and the other current depending on the current flowing in the mains connecting the generator2 with the motor 3.

ing machine 1 is varied so that its terminal voltage changes as that of the starting machine 2 connected in parallel with it also.

changes. In addition to this variation in voltage the field of the regulating machine must be further influenced depending upon the load on the starting machine, in such a way' that the voltage of thisregulating machine during the period allowed for the ab- Specification of Letters Patent. jPftijEKltQd Jana-2 9 Application filed May 12, 1912. S e1ia1 I Io.-696;952. I s. I

-quired for loadingthe driving motor of the starting machine to its maximum-extentas when the same is loaded by the .driveoi the scrption of energy by the fly wheel is sma'lier regulating machine and the motdr g i7ice versa .the field of the regulating machine. a

during the period during which the energy required the motor cannot be supplied by the startingmaclnne aloneon account of the load on thedrivingmotor of 'the'start- 1ng machine must be so -re'gulated' that in;

parallel with the starter it supplies -c rrentfl into the consuming moto rr3.

The system describedallows of hsing any suitable driving motor for the starting ma-q chine. the restriction otits" ma'xiin'ui'n'load I insuring a maximum economy of thesarne.

Further we obtain the advantage that starting machine can be dimensions constant load and not for the whole load'on" the driven motor, the starting machine ing merely divided into two parts of which 'the second at the most is to yield only the difference in power between the motors to be controlled and the starting machine. The additional expenses caused by the sep rate regulating machine -are consequently completely balanced by the cheapening of the starting machine. Apart from this it is possible to allow the starting, machine to work at any suitable speed which,. for instance, is desirable with a turbine drive in which case in consequence of their practically constant powerv yield commutation diffic ulties are avoided. Further, this kind of.

regulation permits of suitable utilization of the fly wheei masses as the regulationof the speed of the same can be eflected with out losses in energy. Also it is possible to couple to the starting machine any suitable current generators, without it being necessary to have to take into account fluctuating voltages. The voltage of the starting machine which remains unchanged during the working period of course also permits of a more efiicient utilization of this machine and of a constant speed of the driving motor.

Having now described my invention what I claim as new and desire to secure by Let ters Patent 2 1. In dynamo electric machinery, in con biuation, a generator and a motor electrically connected one to the other, a dynamo dependenton current flowing between them,

electric machine connected to the generator substantially in shunt with the motor and a mechanical energy storing device mechanically connected to said dynamo electric machine, the generator and dynamo machines each having a field winding, said windings being connected to an external source of energy and provided with controlling means common to both machines, substantially as described.

2. In dynamo electric machinery, in co bination, a generator and a motor electrically connected one to the other, a v.ynaino electric machine connected to the generator in shunt with the motor and a mechanical energy storing device mechanically connected to said dynamo electric machine, the generator and dynamo machines each having a field winding, said windings being connected to an external source of energy and provided with controlling 'means common to both machines, the dynamo electric machine having a second field winding connected to the external source of energy and a controlling means therefor provided with two windings, one being connected to the generator to receive current dependent on the terminal voltage thereof and the other con- I nectcd between the generator and motor and as described.

3. In dynamo electric machinery, in combination, a generator and a motor, electrical connections 'from said generator to said motor, a, prime mover and a mechanical connection from said prime mover to said generator, an exciting winding for said gener-. ator'and an electrical controller connected to said winding, a dynamo electric machine connected in shunt with said generator and said motor, a mechanical energy storing device and a mechanical connection from said dynamo electric machine to said storing device, a further electrical controller andelectrical means comprising differential-wind ings for operating same, said dynamo electric machine having exciting windings, one of whi is electrically.- connected to one controller and the other of which is electrically connected to the other controller, substantially as described.

In test mony whereof, I affix my signature in presence of two witnesses.

LUDWIG THALLMAYER.

Witnesses.

CARL GUBLER, CHAS. H. SELBY. 

